surprisewinner

noun
UK /səˈpraɪz ˈwɪnə/
US /sərˈpraɪz ˈwɪnər/

A surprisewinner is someone who wins when nobody expected them to.

The little horse was a surprisewinner in the big race.


OTHER MEANINGS

2. A person or team that wins a contest after being ranked as a heavy underdog.

Fans cheered for the surprisewinner who beat the top seed.

3. A prize given to someone who did not know they were entered.

She got a surprisewinner award at the party and laughed.

4. A result in a game or race that shocks almost everyone watching.

The surprisewinner crossed the line first, and the crowd gasped.